After Pope Francis experienced one of his worst days since entering the hospital, hundreds of faithful from around the world continue to gather nightly in Vatican City to pray for his recovery.

ROME (AP) — Pope Francis remained in critical but stable condition Tuesday, with his blood parameters remaining stable as he works from the hospital while battling double pneumonia, the Vatican said.

Doctors said he remained in critical condition with double pneumonia but reported a “slight improvement” in some laboratory results.